I never called vitali an oaf. I said he was a little wild and awkward when he was younger but his technique became more polished over time. He has underrated ring generalship. If anything i was saying the opposite. Most pro boxers have several guys that offer advice or chip in on training/conditioning/strategy etc throughout their career. I can hardly think of a single modern fighter who was literally trained by only one guy their ENTIRE career. Guys like ward and hunter are the exception. Your statement that he was "never" trained by steward is simply incorrect. He obviously did more than just chit chat with vitali and eat lunch with him.
Vitali Klitschko could never be described as graceful in the ring to put it mildly but he was incredibly effective.